Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Isha lohan 1
See attached. Ask if any further doubt.
but ans is -cost/2
ohh i see. can you please tell me the source of this ques? is it a book or some test papers? Are you sure that, ans has a 2 at denominator? I mean, are u sure thay the source surely don't have printing mistakes?
I hope you have understood the concept.